Daily Report for 5th May 2022

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Measure Value (anomaly) Time Month cumul. Record High Record Low
Minimum Temperature 7.5 °C (-0.1) 05:17 9.5 °C (+2.0) 11.9 °C (+4.3), 2015 2.5 °C (-5.1), 2010
Maximum Temperature 19.7 °C (+3.2) 16:22 16.9 °C (+0.5) 22.2 °C (+5.7), 2018 9.8 °C (-6.7), 2012
Mean Temperature 13.6 °C (+1.5) 12.7 °C (+1.2) 15.4 °C, 2018 7.1 °C, 2021
Minimum Humidity 60% 16:24 60% 60%, 2022 28%, 2016
Maximum Humidity 91% 06:05 88% 95%, 2015 67%, 2016
Mean Humidity 77% 77% 77%, 2022 41%, 2016
Minimum Pressure 1022 hPa 00:00 1021 hPa 1025 hPa, 2018 988 hPa, 2015
Maximum Pressure 1027 hPa 23:43 1025 hPa 1028 hPa, 2019 1002 hPa, 2015
Mean Pressure 1025 hPa 1023 hPa 1026 hPa, 2018 994 hPa, 2015
Mean Wind Speed 2.4 mph (-2.3) 2.0 mph (-2.7) 11.6 mph, 2015 2.4 mph, 2010
Maximum Wind Speed 10.6 mph 13:08 9.1 mph 25.5 mph, 2015 7.5 mph, 2010
Maximum Gust 13.7 mph 12:30 13.2 mph 42.0 mph, 2015 10.6 mph, 2010
Mean Wind Direction NNW
Rainfall 0.0 mm 3.1 mm (42%) 4.3 mm, 2021
Maximum Hourly Rain n/a 3.4, 2021
Maximum 10-min Rain n/a 1.5, 2021
Maximum Rain Rate n/a 10.8, 2015
Minimum Dew Point 5.8 °C 04:50 6.6 °C 5.8 °C, 2022 -3.7 °C, 2016
Maximum Dew Point 12.7 °C 16:16 10.7 °C 13.9 °C, 2015 3.6 °C, 2019
Mean Dew Point 9.3 °C 8.8 °C 9.3 °C, 2022 0.7 °C, 2016
Measure Value Time Month cumul. Record High Record Low
Night Minimum (21-09) 7.5 °C 05:18 9.5 °C 11.9 °C, 2015 2.5 °C, 2010
Day Maximum (09-21) 19.7 °C 16:23 16.9 °C 22.2 °C, 2018 9.8 °C, 2012
Max 10m Temp Rise 0.6 °C 10:39 0.5 °C 1.3 °C, 2018 0.3 °C, 2012
Max 1hr Temp Rise 2.1 °C 09:58 1.8 °C 4.8 °C, 2018 1.2 °C, 2012
Max 1hr Hum Rise 7% 21:19 11% 23%, 2021 4%, 2011
Max 10m Temp Fall 0.5 °C 20:51 0.5 °C 0.8 °C, 2021 0.3 °C, 2010
Max 1hr Temp Fall 2.3 °C 21:35 2.0 °C 3.3 °C, 2021 1.0 °C, 2012
Max 1hr Hum Fall 10% 11:34 9% 22%, 2018 7%, 2013
Max 10m Wind Speed 6.4 mph 13:08 6.8 mph 18.9 mph, 2015 5.8 mph, 2019
Minimum Feels-like 5.3 °C 05:52 9.0 °C 11.9 °C, 2015 -1.3 °C, 2019
Maximum Feels-like 22.3 °C 16:16 18.1 °C 22.8 °C, 2018 9.3 °C, 2012
Mean Feels-like 14.3 °C 13.4 °C 15.4 °C, 2018 4.9 °C, 2012
Air-frost Hrs 0 hrs 0 hrs 0 hrs, 2009 0 hrs, 2009
Measure Value (anomaly) Month cumul. Record High Record Low
Temperature Range 12.2 °C (+3.2) 7.4 °C (-1.5) 15.1 °C (+6.1), 2018 4.1 °C (-4.9), 2015
Humidity Range 31% 28% 56%, 2018 28%, 2013
Pressure Range 5 hPa 3 hPa 14 hPa, 2015 2 hPa, 2018
Measure Value [% of max] Month cumul. Record High Record Low
Sun Hours 7 [51%]9.1 hrs (31%) [13%] 13.7 [101%], 2018 0.1 [1%], 2012
Wet Hours 04 hrs (62%) [3.3%] 2, 2012 0, 2010
Cloud Cover Partly Cloudy
Events None
Comments -
Extra Comments
Issues None known
Observer Absent? Yes - observations may be unreliable
Pond Temperature (Heath) 15.0 °C
Notes
Times of extremes are computed using the midpoint of the longest continuous period at that extreme value.
Cumulative anomalies are reported according to the expected value for the month-to-date rather than month-end.
Sun hrs are initially pulled from the official weather station at Heathrow, and later adjusted by hand to reflect local conditions based on webcam observations. Wet hrs are dervied algorithmically from rainfall data, though may be adjusted manually. Cloud cover and Events are manually reported, often with multi-week delays.
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Daily Graph of Conditions

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Webcam Summary of Cloud Conditions

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